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Segment Reporting and Concentrations (Details 1) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Segment Reporting Information [Line Items]        
Revenues $ 15,018 $ 16,060 $ 45,271 $ 47,400
Other - principally Europe        
Segment Reporting Information [Line Items]        
Revenues 1,990 1,883 5,475 4,828
United States [Member]        
Segment Reporting Information [Line Items]        
Revenues 7,637 8,263 22,630 24,614
United Kingdom        
Segment Reporting Information [Line Items]        
Revenues 2,320 2,006 7,767 7,096
The Netherlands        
Segment Reporting Information [Line Items]        
Revenues 1,704 2,417 5,187 6,397
Canada        
Segment Reporting Information [Line Items]        
Revenues $ 1,367 $ 1,491 $ 4,212 $ 4,465